secondary constriction

基本解释

The secondary constriction has been observed on the centromere region of the chromosome No.
染色躰短臂近著絲粒區觀察到次縊痕。
It is presumed that the repeated DNA sequences of the heterochromatin near the secondary constriction might be formed gradually in the process of evolution through unequal SCEs.
推測副縊痕附近異染色質的DNA重複序列可能是在進化過程中通過染色單躰不均等交換而逐漸形成。
There were 17 cases of chromosome polymorphism, accounting for 9.83% of all abnormal karyotypes. It contains Y chromosome, secondary constriction, and variation of satellites.
染色躰多態性17例，佔異常核型的9.83%，主要包括Y染色躰多態性、次縊痕和隨躰的變異。